Method for supporting coexistence considering while subchannel allocation in a broadband wireless access system

Abstract

A method for supporting coexistence in a mobile station for supporting a coexistence mode of WiMAX and secondary wireless communication system while considering subchannel allocation, the method comprises, requesting a band adaptive modulation and coding (AMC) for adjacent subcarrier permutation to a base station by transmitting first coexistence information, after the secondary wireless communication is turned on, and requesting a release of the adjacent subcarrier permutation to the base station by transmitting second coexistence information, if the secondary wireless communication system is turned off. Accordingly, it is possible to provide simultaneity of different wireless communications when a sleep mode is used and improve simultaneity of different wireless communications even when the sleep mode is not used.

What is claimed is: 
     
       1. A method for supporting coexistence in a mobile station configured for supporting a coexistence mode of a primary wireless communication system and a secondary wireless communication system while considering subchannel allocation, the method comprising: transmitting to a base station, at the mobile station, a sleep mode request (MOB SLP-REQ) message comprising first coexistence information, for requesting a band adaptive modulation and coding (AMC) for adjacent subcarrier permutation; receiving a sleep mode response message (MOB SLP-RSP) including second coexistence information in response to the MOB SLP-REQ message; and requesting the release of the adjacent subcarrier permutation by transmitting the MOB SLP-REQ message to the base station, wherein the MOB SLP-REQ message includes third coexistence information for requesting partial usage subchannel (PUSC) allocation to the mobile station, wherein the primary wireless communication system is a WiMAX system and the transmission of the MOB SLP-REQ message including the third coexistence information is performed in a WiMAX active period. 
     
     
       2. The method according to  claim 1 , further comprising allocating, via the adjacent subcarrier permutation, subcarriers of an uppermost frequency band or a lowermost frequency band to the mobile station based on a bit value of the first coexistence information. 
     
     
       3. A method for supporting a coexistence operation of a mobile station configured for supporting a coexistence mode of a primary wireless communication system and a secondary wireless communication system, the method comprising:
 receiving from the mobile station, at a base station, a sleep mode request (MOB SLP-REQ) message including first coexistence information for requesting a band adaptive modulation and coding (AMC); and 
 allocating a subchannel of an adjacent channel band to the mobile station. 
 
     
     
       4. The method according to  claim 3 , further comprising allocating the band AMC to the mobile station by allocating subcarriers of an uppermost frequency band or a lowermost frequency band to the mobile station based on a bit value of the first coexistence information. 
     
     
       5. The method according to  claim 1 , further comprising turning on the secondary wireless communication system based on the second coexistence information. 
     
     
       6. The method according to  claim 3 , further comprising transmitting a sleep mode response message (MOB_SLP-RSP) including second coexistence information in response to the MOB_SLP-REQ message. 
     
     
       7. The method according to  claim 3 , further comprising:
 receiving a sleep mode request (MOB_SLP-REQ) message including third coexistence information for requesting partial usage subcarrier (PUSC) allocation from the mobile station; and 
 releasing an adjacent subchannel permutation. 
 
     
     
       8. The method according to  claim 3 , wherein the primary wireless communication system is a WiMAX system and the received MOB_SLP-REQ message includes third coexistence information performed in a WiMAX active period.